fix(deprecations): fixed sqlalchemy warning about non-cachable JsonObject

rhodecode/lib/jsonalchemy.py

@@ -50,6 +50,7 b' class JSONEncodedObj(sqlalchemy.types.Ty'
     impl = UnicodeText
     safe = True
     enforce_str = True
+    cache_ok = True
 
     def __init__(self, *args, **kwargs):
         self.default = kwargs.pop('default', None)